The PTCRB is a North American alliance of cellular providers, and tests to make sure the phone will run smoothly on all networks when updated to new software.
Sony Ericsson has now submitted its Xperia Arc and Xperia Neo for testing, although there's no word on the Arc S or Neo V at this time - presumably these are either the same thing or will be submitted for their own inclusion in good time.
Either way, it's excellent news for the reams of fans that are looking forward to giving their handset a new lease of life when Android 4.0 lands - we're intrigued to see what Sony Ericsson will do beneath its TimeScape overlay.
The move shows that the soon to be solely Japanese firm is sticking to its word - where before Sony Ericsson handsets were among the worst for getting the latest version of Android, a tweak to the UI means it can now be 'unhooked' much more easily from the OS to facilitate upgrades.
Given the phones are in testing now, we're hopeful for an Xperia Arc and Xperia Neo Ice Cream Sandwich UK release date of somewhere in February 2012.
For a heads up on what to expect when Ice Cream Sandwich hits your phone, check out the tasty video below: